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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Buletin Udayana Mengabdi Jurnal SPEKTRUM TELKOMNIKA (Telecommunication Computing Electronics and Control) PROSIDING CSGTEIS 2013 International Journal of Engineering and Emerging Technology Indonesian Journal of Electrical Engineering and Computer Science Journal of Applied Science, Engineering, Technology, and Education Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Jurnal SPEKTRUM Journal of Electrical, Electronics and Informatics

Wayan Gede Ariastina

Study Program Of Electrical Engineering, Faculty Of Engineering,Udayana University

Author-ID : 554089

Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Other

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STUDI SISTEM PROTEKSI LINE CURRENT DIFFERENTIAL RELAY PADA SALURAN TRANSMISI 150 KV N. B. Dharmawan; W. G. Ariastina; A. A. N. Amrita
Jurnal SPEKTRUM Vol 7 No 1 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Increasing electricity demand in South Bali requires a reliable electrical system. Reliableelectrical systems can be achieved in various ways, one of which is the replacement of highvoltage overhead line to high voltage underground cable. The replacement high voltageoverhead line to high voltage underground cable requires adjustment of the protection system.The previous main protection system used in high voltage overhead line is distance relay, whilethe protection system for the new transmission network is line current differential relay. Thepurpose of this study is to analyze GIS Pesanggaran to GI Nusa Dua transmission line’sprotection system. The covered in this analysis is to power flow analysis simulation, 3 phaseshort circuit simulation, relays setting calculation and testing the relays setting.The power flowsimulation showed that the current at peak load from GIS Pesanggaran to GI Nusa Dua is 337A. The 3 phase short circuit simulation showed that the largest short circuit, if a fault occurs onthe GI Nusa Dua of 9.54 kA. The relays setting calcullation showed that of 0,2 A with 20 %slope for Is1 and 2 A with 150% slope for Is2. The results showed that the relays setting hasworked properly.

ANALISIS UNJUK KERJA PLTD-G 40 KW BERBAHAN BAKAR MINYAK DIESEL DAN PELET BIOMASSA (STUDI KASUS DI PT INDONESIA POWER BALI) Yohana Fransisca Sarumpaet; I Nyoman Satya Kumara; Wayan Gede Ariastina
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Fossil-fueled power plants are still the world’s backbone in terms of electricitygeneration, including in Indonesia. This will continue to increase due to the high demand ofelectricity. Meanwhile, the amount of fossil fuels is limited and fossil fuel creates exhaustemissions. Therefore, it is required to look for clean and renewable electricity generationmethods. The development of Diesel Gasifier Power Plant carried out by PT Indonesia PowerBali aims to reduce the use of diesel by using syngas obtained from gasification of biomasspellets. This study analyzes the performance of the Diesel Gasifier Power Plant at PT IndonesiaPower Bali. The results show that the use of syngas reduces the use of diesel, this is indicatedby the fuel consumption ratio between diesel and syngas, which is 56% diesel and 44% syngas.The results also show that the Diesel Gasifier Power Plant has an efficiency of 63% and acapacity factor of 58%.

RENCANA PEMASANGAN DISTRIBUTED GENERATION PADA JARINGAN DISTRIBUSI SERTA PENGARUHNYA TERHADAP PROFIL TEGANGAN DAN RUGI-RUGI DAYA A. A. T. B. Artawan; I W. Sukerayasa; W. G. Ariastina
Jurnal SPEKTRUM Vol 7 No 1 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Jatiluwih feeder is a primary 20 kV distribution network with a peak demand of 1.85 MW. The feeder has a radial configuration with a length of 120 kmc. The extended length of the feeder causes a high voltage drop and power loss. One strategy to reduce voltage drop and power loss is by the installation of distributed generation (DG). The energy resource of the DG usually adopts local available renewable energy resources, such as solar power and hydro power. This paper discusses voltage profile and power loss due to the installation of DG on the distribution network. The analysis covered survey of the available renewable energy resources and power flow simulation. Power flow simulation was carried out in two scenarios, before and after the installation of DG. The simulation results showed that during peak daytime load, DG installation is able to reduce maximum voltage drop by 2,08 %, and increases the voltage from 344,4 V to 352,7 V. Besides that, the installation of DG is able to reduce the total power loss by 9,43 % or as much as 530 kW.

Studi Tegangan Tembus Minyak Transformator I Nyoman Oksa Winanta; Anak Agung Ngurah Amrita; Wayan Gede Ariastina
Jurnal SPEKTRUM Vol 6 No 3 (2019): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

This study aims to identify the effect of changes in temperature, water content, andelectrode gap on the breakdown voltage of transformer oil. The transformer oil used in this studywas Shell Diala-B and Nynas oil. Testing the effect of temperature was carried out attemperature variation of 280 C to 810 C, the effect of water content was carried out withvariations ranging from 11 ppm to 31 ppm, and the effect of electrode gap was carried out invariation ranges between 1.2 mm to 2.5 mm. Breakdown voltage testing method useshemispherical electrodes according to IEC 60156 standard of 1995. The results of the studyshow that the higher the temperature, the higher the breakdown voltage of transformer oil. Thehighest breakdown voltage in Nynas oil occurs when the temperature is 810 C which is equal to59.27 kV. The results also show that the higher the water content, the breakdown voltage islower. The highest breakdown voltage in Shell Diala-B oil occurs with a water content of 11 ppmwhich is equal to 61.35 kV. Also the greater the electrode gap, the greater the breakdownvoltage. The highest breakdown voltage in Nynas oil occurs with the gap of electrode 2.5 mmwhich is equal to 60.02 kV.

Studi Kestabilan Sistem dan Pelepasan Beban (Load Shedding) Berdasarkan Standar IEEE di PT. Pertamina (Persero) Refinery Unit IV N. Nuswantara; W.G. Ariastina; A. A. N. Amrita
Jurnal SPEKTRUM Vol 4 No 1 (2017): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Dalam mengatasi kondisi overload generator saat terjadi gangguan yang menyebabkan ketidak stabilan, PT. Pertamina RU IV mengandalkan kerja load shedding berdasarkan SOP yang telah ditetapkan. Namun dalam pelaksanaannya prosedur SOP yang diberlakukan memiliki beberapa kekurangan, diantaranya adalah belum sesuai dengan standar IEEE yang berlaku global, waktu untuk menstabilkan kembali sistem cukup lama, serta seringkali terjadi pelepasan beban yang sebenarnya tidak perlu. Oleh karena itu, dilakukan studi terhadap kestabilan sistem dan load shedding yang diberlakukan dengan menggunakan standar IEEE sebagai acuan. Hasil studi menunjukkan, penggunaan load shedding IEEE untuk mengatasi masalah kestabilan sistem di PT. Pertamina RU IV lebih efektif, hal ini dapat dilihat dari hasil pengujian kestabilan sistem dimana prosedur load shedding IEEE berhasil menstabilkan kembali frekuensi sistem menjadi 99,85% dalam waktu 23 detik, 98,5% dalam waktu 8 detik, 99,16% dalam waktu 40 detik menjadi 98,48% dalam waktu 70 detik pada 4 studi kasus yang dilakukan.

Studi Tarif Listrik Dengan Menggunakan Metode Long Run Marginal Cost Di EDTL Timor Leste Norberto Soares; Ida Ayu Dwi Giriantari; Wayan Gede Ariastina
PROSIDING CSGTEIS 2013 CSGTEIS 2013
Publisher : PROSIDING CSGTEIS 2013

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Abstrak—Untuk mencukupi suplai energi listrik ke semua pelanggan, maka pemerintah telah mengalokasikan biaya investasi guna pengembangan sektor kelistrikan di Timor Leste. Biaya investasi untuk pembangunan pembangkit, transmisi 150 kV maupun sistem distribusi semuanya bersumber dari anggaran belanja negara atau Orçamento Geral do Eestado (OGE) de Timor Leste. Selain itu setiap tahun pemerintah tetap mengalokasikan anggaran guna mempertahankan kelangsungan pengoperasian dan penyediaan energi listrik yang berkesinambungan, akibat dari kerugian yang dialami pihak EDTL setiap tahunnya. Salah satu penyebab kerugian ini yaitu mengingat penetapan tarif listrik selama ini sangat rendah dan belum sepenuhnya berdasarkan pada prinsip-prinsip tarif yang ekonomis. Untuk itu perlu menentukan tarif listrik yang memenuhi nilai keekonomian agar pihak penyedia tenaga listrik dan para konsumen bisa memperoleh keuntungan dan harga yang wajar.Tujuan dari studi ini adalah untuk menganalisa dan mengadakan perhitungan tarif listrik yang mengacu pada nilai keekonomiannya dengan menggunakan metode long run marginal cost (LRMC). Studi ini hanya membahas tentang penentuan tarif listrik di Timor Leste dengan menggunakan metode LRMC. Sehingga dari pembahasannya akan memberikan gambaran mengenai pemanfaatan sumber daya yang seimbang antara biaya pemanfaatan energi dan biaya pasokan energi listrik.Dari hasil analisis dan perhitungan dapat disimpulkan bahwa tarif listrik rata-rata yang diimplentasikan oleh pemerintah saat ini sebesar $0,15/kWh tidak memberikan indikator keuntungan kepada pihak penyedia tenaga listrik. Namun, dari perhitungan dengan metode LRMC dapat diketahui bahwa tarif rata-rata yang wajar sebesar $0,37/kWh. Dengan demikian, pihak EDTL akan memperoleh peningkatan pendapatan jika dibandingkan dengan eksisting tarif 2012.Kata kunci—Studi Tarif listrik, Alokasi tarif Tiap Kategori Pelanggan, EDTL Timor Leste, Long Run Marginal Cost, PLTD Hera dan Betano.

ANALISIS PERKEMBANGAN PLTS DI PROVINSI SUMATERA SELATAN MENUJU TARGET 296,6 MW PADA TAHUN 2025 D.Y. Manurung; I.N.S. Kumara; W.G. Ariastina W.G. Ariastina; J. Pangaribuan
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Target capacity of Solar Power Plant in Province of South Sumatra is pursued throughthe construction of a rooftop PV mini-grid system with off-grid and on-grid systems. Based onNational Energy General Plan (RUEN) in 2017, Province of South Sumatra has the third largestsolar power potential on a national scale with a target of Solar Power Plant developmentreaching 296.6 MW in 2025. Province of South Sumatra is the second most populous provinceon Sumatra Island with electricity consumption reaching 5,308 GWh in 2020. This study tries toanalyze the development of Solar Power Plant in Province of South Sumatra based on theliterature review. Solar Power Plant that has been installed until 2021 reached 12.441 MW oraround 4.12% of the South Sumatra RUEN target of 296.6 MW in 2025. The types of SolarPower Plant applications in Province of South Sumatra consist schools, hotels, palm oilfactories, irrigation pumps , and utility networks spread across Palembang, Muara EnimRegency, Muara Rawas Regency, and Ogan Hilir Regency

Middleware ETL with CDC based on Event Driven Programming I Gede Adnyana; Made Sudarma; Wayan Gede Ariastina
International Journal of Engineering and Emerging Technology Vol 3 No 2 (2018): July - December
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

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To achieve the real time data warehouse is strongly influenced by the process in the data warehouse known as Extract, Tranform, Loading (ETL). One way to optimize the ETL process is processing only data that undergoes changes on the On Line Transaction Processing (OLTP) system. This technique is known as Change Data Capture (CDC) which is designed to maximize the efficiency of the ETL process. In this research middleware was built as a place where the ETL process will be carried out, transaction data from the OLTP system will be captured and sent directly to the middleware for further processing. The method used to capture changes in OLTP systems is Change Data Capture (CDC) based on Event Driven Programming, where this technique relies on events that occur in OLTP in capturing data changes. Functional testing is done by making a simulation of the insert and update processes in test applications namely OLTP CRM system.The results of the research obtained are (1) Change Data Capture (CDC) based on Event Driven Programming can capture changes in data that occur in OLTP CRM database;(2) ETL process to load data from Normalized Data Store (NDS ) to data warehouse with Timestamp technique can load data that only undergoes changes that are processed to be loaded in Data Warehouse;(3) An increase in the amount of data that is processed has an effect on increasing processing time. Other factors that affect the value of process time are execution plan and cache memory

Effect of Solvents on Natural Dyes Extraction from Mangosteen Waste for Dye Sensitized Solar Cell Application I Nyoman Setiawan; Ida Ayu Dwi Giriantari; Wayan Gede Ariastina; Ida Bagus Alit Swamardika
International Journal of Engineering and Emerging Technology Vol 3 No 2 (2018): July - December
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

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Natural dyes are economically and environmentally superior to ruthenium-based dyes because they are cheap and non-toxic. In this study, natural dyes were extracted from mangosteen peel waste. Color extraction was carried out with three types of solvents (distilled water, methanol and ethanol) which had been acidified with 10% citric acid and with a ratio of material: solvent (1: 4, 1: 6, 1: 8 w / v). The photochemical properties are studied by UV-Vis spectrophotometer and FTIR spectroscopy. The absorption peak of the three types of solvent occurs at different wavelengths. The presence of carbonyl (C = O) and hydroxyl (OH) groups contained in anthocyanins can attach coloring to the surface of TiO2. Ethanol solvents with a ratio of 1: 8 produce the lowest photon energy at wavelength and absorption coefficient of 539.00 nm and 2,008 km-1 respectively. The lowest band gap of the dye helps electrons move rapidly from the valence band to the conduction band and only requires less energy for electron recombination which will increase the performance of the DSSC.

A Placement and Sizing of Distributed Generation Based on Combines Sensitivity Factor and Particle Swarm Optimization: A Case Study in Bali’s Power Transmission Networks Ngakan Putu Satrya Utama; Rukmi Sari Hartati; Wayan Gede Ariastina; Ida Bagus Alit Swamardika
International Journal of Engineering and Emerging Technology Vol 2 No 2 (2017): July - December
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

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Although many methods for optimizing DGplacement and its size in a network with the target of reducingsystem power losses and voltage profile have already beencommended, they still lack from several weaknesses. As a resultmuch can be done about to happen with new algorithms. Theproposed algorithms commonly have stressed their formulationson real power losses only and ignored the reactive power losses.Power systems reactive power injection plays an important rolein voltage stability control, thus the reactive power losses need tobe incorporated in optimizing DG allocation considering theirvoltage profile improvement. Whereas Particle SwarmOptimization (PSO) approach was proposed for finding theoptimal size of DG. This study work intended to apply both realand reactive power flow, power loss sensitivity factors and PSOmethod in finding the candidate buses for DG placement and itssize on Bali’s 150 kV transmission networks. The experimentalresults show that the proposed algorithm is indeed capable ofobtaining a good quality solution efficiently

Co-Authors A I Weking A. A. Ngurah Bagus Budi Nathawibawa A. A. T. B. Artawan A. Andriani A. Ibi Weking A.A Ngurah Amrita A.A. Gede Ari Pawitra Putra A.I. Weking AA. M Pemayun Abdul Latif Abdul Qodir Abid Surya Bimantara Agus Selamet Duniaji Awgustus Patandean Bawa Adiputra C. G. I. Partha, C. G. I. C. G. Indra Partha D. A. S. Santiari D.Y. Manurung Derren, M. Dewa ayu Nancy Cahyani Dharmawan, N. B. Dony Septa Primadita DPD Suparyawan G.K. Sandy Gede Endrawadi Gede Ogiana Gede Sukadarmika Govinda Riawan H.C Soetanto Haekal, Muhammad Hasan Dedy Sudono I Dewa Gede Wisnu Agung Bayuna I G.N. Evan Aditya Pramana I Gede Adnyana I Gede Budhi Arsana I GN Dion Adiputra I Gusti Ngurah Priambadi I K. S. T. Lilayoga I Kadek Hendy Wijaya I Kadek Krisna Yoga I Ketut Citra Adi Putra I M Suartika I M.T. Sismantara I N Satya Kumara I N. S. Kumara I N. Setiawan I Nyoman Budiastra I Nyoman Oksa Winanta I Nyoman Setiawan I Nyoman Suprapta Winaya I P. A. Edi Pramana I Putu Arsikaputra I Putu Eka April Yanto I W A Wijaya I W A WINARTA I W Rinas I W.Y.M. Wiguna I Wayan Arta Saputra I Wayan Arta Wijaya I Wayan Sukerayasa I. N. S. Kumara I. W. Sukerayasa, I. W. I.B.G. Manuaba I.G.W. Artana I.N.S. Kumara I.P.H. Wahyudi I.W. Yudi Martha Wiguna Ida Ayu Dwi Giriantari Ida Bagus A. Swamardika Ida Bagus Bawa Adiputra Indra Baskara INS Kumara INS Kumara Intan Aprilia Medina IW Gunarta J. Pangaribuan Julius Mahendra Sihombing Juniastra Gina K A Kartika Sari Kadek Ary Budi Permana Kadek Hari Merta Kadek Sumariana Kenny Angel Manik Ketut Vidhia Kumara Komang Oka Saputra Kumara, I N. S. Kumara, I. N. S. l Gusti Ngurah Janardana Leba, G. I. M. Lie Jasa M.K. Huda M.T. S.T. I Wayan Sutaya . Made Sudarma mahadi putra Michael Candra Santoso Muhammad Hari Wijaya Muhammad Malik Al Falah N. A. Kartono N. B. Dharmawan N. Nuswantara N. W. Sindi N.W. Budiantari Ngakan Putu Satriya Utama Ngakan Putu Satrya Utama Ni Made Ary Esta Dewi Wirastuti Ni Made Ary Esta Dewi Wirastuti NM Karmiathi Norberto Soares Nurwijayanti Nyoman Gede Yudiarta Ontoseno Penangsang Pande K. B. Sutawan Putu Martha Risnadinata R.S. Hartati Rukmi Sari Hartati Santiari, D. A. S. Sari, N. P. A. R. Sembiring, Rinawati Setiawan, I N. Setiawan, I. N. Sinaga, P. M. Solly Aryza Suriana, I Wayan Surung Rafael Sihaloho Virgunia, D. A. Widianto, I. G. A. Yohana Fransisca Sarumpaet

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